diff --git a/src/regexp/example_test.go b/src/regexp/example_test.go
index 57b18e3fd74..10eb736c7c4 100644
--- a/src/regexp/example_test.go
+++ b/src/regexp/example_test.go
@@ -94,9 +94,11 @@ func ExampleRegexp_FindSubmatch() {
 func ExampleRegexp_Match() {
 	re := regexp.MustCompile(`foo.?`)
 	fmt.Println(re.Match([]byte(`seafood fool`)))
+	fmt.Println(re.Match([]byte(`something else`)))
 
 	// Output:
 	// true
+	// false
 }
 
 func ExampleRegexp_FindString() {
@@ -182,9 +184,13 @@ func ExampleRegexp_MatchString() {
 }
 
 func ExampleRegexp_NumSubexp() {
+	re0 := regexp.MustCompile(`a.`)
+	fmt.Printf("%d\n", re0.NumSubexp())
+
 	re := regexp.MustCompile(`(.*)((a)b)(.*)a`)
 	fmt.Println(re.NumSubexp())
 	// Output:
+	// 0
 	// 4
 }
 
@@ -348,6 +354,7 @@ func ExampleRegexp_FindIndex() {
 	// [18 33]
 	// option1: value1
 }
+
 func ExampleRegexp_FindAllSubmatchIndex() {
 	content := []byte(`
 	# comment line
@@ -373,3 +380,13 @@ func ExampleRegexp_FindAllSubmatchIndex() {
 	// option2
 	// value2
 }
+
+func ExampleRegexp_FindAllIndex() {
+	content := []byte("London")
+	re := regexp.MustCompile(`o.`)
+	fmt.Println(re.FindAllIndex(content, 1))
+	fmt.Println(re.FindAllIndex(content, -1))
+	// Output:
+	// [[1 3]]
+	// [[1 3] [4 6]]
+}